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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2020
Share-based Payment Arrangement [Abstract] |
Components of Stock-Based Compensation Expenses | The following table summarizes the components of stock-based compensation expense recognized in the Company’s condensed consolidated statements of income and comprehensive income for the periods indicated:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
Cost of revenues (exclusive of depreciation and amortization) | $ | 10,854 |  |  | $ | 7,580 |  |  | $ | 23,796 |  |  | $ | 27,841 |
Selling, general and administrative expenses | 12,620 |  |  | 7,891 |  |  | 30,998 |  |  | 25,183 |
Total | $ | 23,474 |  |  | $ | 15,471 |  |  | $ | 54,794 |  |  | $ | 53,024 |
Stock Options Activity | Stock option activity under the Company’s plans is set forth below:
| Number of Options |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value |  | Weighted Average Remaining Contractual Term (in years)
Options outstanding at January 1, 2020 | 3,322,930 |  |  | $ | 50.85 |  |  |  |  |
Options granted | 147,351 |  |  | $ | 176.21 |  |  |  |  |
Options modified | (198) |  |  | $ | 73.27 |  |  |  |  |
Options exercised | (592,904) |  |  | $ | 38.76 |  |  |  |  |
Options forfeited/cancelled | (9,137) |  |  | $ | 117.40 |  |  |  |  |
Options outstanding at September 30, 2020 | 2,868,042 |  |  | $ | 59.58 |  |  | $ | 756,305 |  |  | 4.5
Options vested and exercisable at September 30, 2020 | 2,489,928 |  |  | $ | 46.31 |  |  | $ | 689,630 |  |  | 3.9
Options expected to vest at September 30, 2020 | 353,203 |  |  | $ | 145.98 |  |  | $ | 62,624 |  |  | 8.4
Service-Based Awards Activity | The table below summarizes activity related to the Company’s equity-classified and liability-classified service-based awards for the nine months ended September 30, 2020:
| Equity-Classified Restricted Stock |  | Equity-Classified Equity-Settled Restricted Stock Units |  | Liability-Classified Cash-Settled Restricted Stock Units
| Number of Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Number of Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Number of Shares |  | Weighted Average Grant Date Fair Value Per Share
Unvested service-based awards outstanding at January 1, 2020 | 9,791 |  |  | $ | 162.96 |  |  | 758,785 |  |  | $ | 122.48 |  |  | 242,288 |  |  | $ | 105.40 |
Awards granted | — |  |  | $ | — |  |  | 252,376 |  |  | $ | 180.39 |  |  | 59,770 |  |  | $ | 180.37 |
Awards modified | — |  |  | $ | — |  |  | (1,237) |  |  | $ | 122.55 |  |  | — |  |  | $ | — |
Awards vested | (397) |  |  | $ | 63.10 |  |  | (298,331) |  |  | $ | 107.31 |  |  | (121,399) |  |  | $ | 91.22 |
Awards forfeited/cancelled | — |  |  | $ | — |  |  | (35,446) |  |  | $ | 140.33 |  |  | (4,106) |  |  | $ | 112.58 |
Unvested service-based awards outstanding at September 30, 2020 | 9,394 |  |  | $ | 167.18 |  |  | 676,147 |  |  | $ | 149.85 |  |  | 176,553 |  |  | $ | 140.36 |
Performance-Based Awards Activity | The table below summarizes activity related to the Company’s equity-classified performance-based awards for the nine months ended September 30, 2020:
| Equity-Classified Equity-Settled Restricted Stock |  | Equity-Classified Equity-Settled Restricted Stock Units
| Number of Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Number of Shares |  | Weighted Average Grant Date Fair Value Per Share
Unvested performance-based awards outstanding at January 1, 2020 | 9,393 |  |  | $ | 165.87 |  |  | — |  |  | $ | — |
Awards granted | — |  |  | $ | — |  |  | 31,354 |  |  | $ | 210.44 |
Unvested performance-based awards outstanding at September 30, 2020 | 9,393 |  |  | $ | 165.87 |  |  | 31,354 |  |  | $ | 210.44 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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